freedreno/a3xx: set .zw of sprite coords to .01
freedreno/a3xx: set .zw of sprite coords to .01

Fixes non-determinism in bin/point-sprite rendering, and the stars on
the intro screen to neverball.

Cc: "10.6" <59f39c0db42d4479a46b02d4d2bc11120e37bb44@lists.freedesktop.org>
Signed-off-by: Ilia Mirkin <bcbbb7aa705ec3a5fc5824c01a845186c3d62fca@alum.mit.edu>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler